CVE-2026-50200 Steeltoe's env sanitizer misses connection strings — leaks embedded DB passwords
Attackers can read database passwords from environment endpoints because the sanitizer fails to redact connection strings.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-50200?
CVE-2026-50200 is a high-severity vulnerability in SteeltoeOSS Steeltoe.Management.Endpoint, published on 17 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Steeltoe is an open source project that provides a collection of libraries that helps users build cloud-native applications. In Steeltoe.Management.Endpoint prior to version 4.2.0 and Steeltoe.Management.EndpointCore prior to version 3.4.0, the `Sanitizer` component in the Environment actuator redacts configuration values by matching the configuration key name against a suffix list. The default list (`password`, `secret`, `key`, `token`, `.*credentials.*`, `vcap_services`) does not cover the standard .NET pattern `ConnectionStrings:<name>` or Steeltoe Connectors' `Steeltoe:Client:<type>:Default:ConnectionString`. There is no value-based scrubbing, so full connection string values including embedded `Password=` and `user:pass@host` segments are returned verbatim in `/actuator/env` responses. Steeltoe.Management.Endpoint 4.2.0 and Steeltoe.Management.EndpointCore 3.4.0 patch the issue. If an immediate upgrade is not possible: On the standard path, remove `env` from the actuator exposure list; add `.*connectionstring.*` to `KeysToSanitize` as a defense-in-depth measure for both paths; and/or require authorization on actuator endpoints.
Which versions are affected by CVE-2026-50200?
4 open source packages ship an affected version, including Steeltoe.Management.Endpoint and Steeltoe.Management.EndpointCore.
| Package | Affected | Fixed in |
|---|---|---|
Steeltoe.Management.Endpoint NuGet | All versions | 4.2.0 |
Steeltoe.Management.Endpoint NuGet | All versions | 4.2.0 |
Steeltoe.Management.EndpointCore NuGet | All versions | 3.4.0 |
Steeltoe.Management.EndpointCore NuGet | All versions | 3.4.0 |
How do I fix CVE-2026-50200?
Upgrade Steeltoe.Management.Endpoint to 4.2.0 or later.
Is CVE-2026-50200 being exploited?
There is no known exploitation of CVE-2026-50200 in the wild and no public exploit code.
Sources
Also known as GHSA-q62h-354g-5r85.